csky: bugfix libc sync_file_range.c for csky.
csky: bugfix libc sync_file_range.c for csky.

Use __NR_sync_file_range2 for csky sync_file_range function.

Signed-off-by: Guo Ren <2df609094c4a4e1d594766f422c5023305dc5f41@c-sky.com>

wbx-github/uclibc-ng,kraj/uclibc-ng,wbx-github/uclibc-ng,kraj/uclibc-ng,wbx-github/uclibc-ng,wbx-github/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng